Diing Battery - Ranger-Forums - The Ultimate Ford Ranger Resource
Ford Ranger Forum - Forums for Ford Ranger enthusiast!

Go Back   Ranger-Forums - The Ultimate Ford Ranger Resource Arrow Ranger-Forums Technical Forum Arrow General Technical & Electrical

General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

LinkBack Thread Tools Search this Thread
Old 03-10-2016
Thread Starter

I am: John Kyle
Join Date: Mar 2016
Location: Birmingham Alabama
Vehicle: 2001 Ford Ranger
Drive Type: 4x4
Engine: 4.0
Posts: 1
Total Props: 0
Diing Battery

Help Needed. When Battery is charged truck cranks and runs fine. Alternator appears to be charging. After about 3 days of not driving the battery will be dead. Have replaced Battery. Alternator has not been checked yet. What are other possibilities? Thanks
Reply With Quote
+ 0 -
Old 03-10-2016
TheArcticWolf1911's Avatar

I am: Cameron Howard
Join Date: Nov 2015
Location: Evansville, Indiana
Vehicle: 1999 Ford Ranger
Drive Type: 4x4
Engine: 3.0
Posts: 1,090
Total Props: 6
Parasitic draw, most likely. Do you have a multimeter with an ampere setting? If you don't, you're going to need to obtain one.

To do this, set up the meter to read how many amps are flowing. Read your specific instruction manual on how to do this. Once it's configured, disconnect the negative side of the battery and join the meter in series, so that current flows through the meter to get back to the battery.

Ideally you should see zero. Anything less than 30 milliamps (mA) is what I would consider normal. If you see anything significantly above 30 milliamps, for example 70 milliamps or greater then we'll diagnose further.

If you have a load tester (25 dollars at either harbor freight or menards can get you a good one), then go ahead and use that. If not, places like autozone will check your alternator for free in most cases if you don't want to buy the equipment.
Reply With Quote
+ 0 -

Similar Threads
Thread Thread Starter Forum Replies Last Post
New alternator and battery, battery not charging.. diverman241 General Technical & Electrical 9 03-26-2016 10:56 AM
1996 Battery light coming on, yet battery and alternator work' SariahLeah SOHC - 2.3L & 2.5L Lima Engines 2 06-04-2010 03:16 PM
running battery down, battery discharge from playing an amp'd system onebluemcm Audio & Video Tech 12 04-13-2007 03:48 PM
Got a new battery today (had to...) n3elz General Technical & Electrical 13 12-22-2004 05:22 PM
Where to run wire from battery into cab? JSpence819 Audio & Video Tech 6 07-08-2004 08:37 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -6. The time now is 06:00 PM.